EP3240462A2 - Appareil de nettoyage pour le nettoyage de tamis de filtre - Google Patents

Appareil de nettoyage pour le nettoyage de tamis de filtre

Info

Publication number
EP3240462A2
EP3240462A2 EP16732887.1A EP16732887A EP3240462A2 EP 3240462 A2 EP3240462 A2 EP 3240462A2 EP 16732887 A EP16732887 A EP 16732887A EP 3240462 A2 EP3240462 A2 EP 3240462A2
Authority
EP
European Patent Office
Prior art keywords
filter screen
suction chamber
dirt collection
conduit system
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16732887.1A
Other languages
German (de)
English (en)
Other versions
EP3240462B1 (fr
EP3240462A4 (fr
Inventor
Abhijit Bhaskar JOSHI
Ajit Bhavarlal Jain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jain Irrigation Systems Ltd
Original Assignee
Jain Irrigation Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jain Irrigation Systems Ltd filed Critical Jain Irrigation Systems Ltd
Publication of EP3240462A2 publication Critical patent/EP3240462A2/fr
Publication of EP3240462A4 publication Critical patent/EP3240462A4/fr
Application granted granted Critical
Publication of EP3240462B1 publication Critical patent/EP3240462B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens

Definitions

  • This invention generally relates to a cleaning apparatus for cleaning filter screens and specifically to cleaning apparatus for cleaning filter screens having nozzles for creating suction.
  • This invention finds particular, but not exclusive, application in industries employing filter screens for filtering purposes.
  • Dust extraction assemblies for removing contamination are constructed of a plurality of nozzles at pre-defined distances from the surface of filter element. Such nozzles are connected to collector pipe which moves with the help of hydraulics or electric motors. A purge valve is connected to the dust collector pipe which opens to the atmosphere. Cleaning of the filter screen is done automatically either on the basis of differential pressure between filter housing and pressure at the purge valve outlet (atmospheric pressure) or it can be done according to preset time interval.
  • the purge valve opens and fluid enters into the plurality of nozzles which are in close proximity to the filter screen.
  • debris/retentate deposited on the element surface is pulled out through nozzles and finally discharged from filter housing through the flushing line.
  • a cleaning apparatus for cleaning filter screen comprising a suction chamber movably positioned adjacent a filter screen to be cleaned such that a first end of the suction chamber is positioned adjacent an inner surface of the filter screen and a second end of the suction chamber being coupled to a dirt collection conduit system for fluid communication with the dirt collection system.
  • the outer surface of the filter screen is arranged to be at a higher pressure than the dirt collection conduit system such that a pressure differential is arranged to be maintained between the outer surface of the filter screen and the dirt collection conduit system through the suction chamber.
  • the suction chamber further comprises a nozzle at the first end, wherein a largest diameter of the nozzle is lesser than an inner diameter of the suction chamber, the nozzle and the suction chamber arranged concentrically.
  • the suction chamber further comprises a circular clearance between the largest diameter of the nozzle and the inner diameter of the suction chamber.
  • the pressure differential is arranged to facilitate movement of fluid from the outer surface of the filter screen to the dirt collection conduit system and wherein the fluid movement through the nozzle of the suction chamber creates a low pressure regime around a mouth of the nozzle inside the suction chamber, thereby facilitating fluid from the outer surface of the filter screen to rush towards the low pressure regime through the circular clearance, thus removing retentate forcefully from the inner surface of the filter screen.
  • Figure 1 shows a screen filtering system with a cleaning apparatus for cleaning the filter screen in the screen filtering system
  • Figure 2 shows a first embodiment of the cleaning apparatus
  • Figure 3 shows a divergent nozzle disposed in the suction chamber of the first embodiment of the cleaning apparatus
  • Figure 4 shows a second embodiment of the cleaning apparatus
  • Figure 5a shows a front elevational view of an orifice plate
  • Figure 5b shows a longitudinal sectional view along section A-A of the orifice plate shown in Figure 5a
  • Figure 6 shows a first arrangement of a nozzle in the conduit of the dirt collection conduit system
  • Figure 7 shows a schematic of the working of the nozzle shown in Figure 6
  • Figure 8 shows a second arrangement of an orifice plate in the conduit of the dirt collection conduit system
  • Figure 9 shows a schematic of the working of the orifice plate shown in Figure 8 Detailed Description
  • FIG. 1 shows a screen filtering system 100 with a cleaning apparatus 200 for cleaning the filter screen 105 in the screen filtering system 100.
  • the screen filtering system 100 comprises a housing 110 which is circular in profile.
  • the screen filter 105 is fitted by way of suitable fastening arrangements to the housing 110 internally, the fastening arrangements being water proof.
  • the housing 110 and the filter screen 105 are concentric cylinders with the filter screen 105 arranged internally to the housing 110.
  • the screen filtering system 100 further comprises an inlet pipe 115 which opens into a chamber 120 internal to the filter screen 105.
  • the water that is pressurized passes through the filter screen 105 into the circular clearance or interval 125 between the filter screen 105 and the housing 110 and exist through an exit pipe 130 which is controlled by a valve 135.
  • the contaminants in the fluid get accumulated on an inner surface 140 of the filter screen 105.
  • the accumulated contaminants form as retenta ' te on the inner or internal surface 140 of the filter screen 105.
  • FIG. 2 shows a first embodiment of the cleaning apparatus 200.
  • the cleaning apparatus 200 comprises a suction chamber 205, which is a cylindrical element of constant diameter that is movably positioned adjacent the filter screen 105 to be cleaned.
  • the suction chamber 205 is positioned in such a way that it is orthogonal to the filter screen 105.
  • the suction chamber 205 comprises a first end 210 adjacent the inner surface 140 of the filter screen 105 and a second end 215 of the suction chamber 205 coupled to a dirt collection conduit system 220.
  • the dirt collection conduit system 220 extends along an axis 1 lO' of the housing 110.
  • the suction chamber 205 extends from the dirt collection conduit system 220 to the inner surface 140 of the filter screen.
  • the suction chamber 205 is orthogonal to the axis 110' as well.
  • the suction chamber 205 is coupled to the dirt collection conduit system 220 such that there is fluid communication between the suction chamber 205 and the dirt collection conduit system 220.
  • the filter screen comprises an outer or external surface 145 which is arranged to be at atmospheric pressure or a pressure higher than that when the cleaning apparatus 200 is being used.
  • the dirt collection conduit system 220 extends along the axis 110' of the housing 110 and opens out externally through a purge outlet 150 and a purging valve 155.
  • the purge outlet 150 is connected to a low pressure environment when the cleaning apparatus 200 is being used. Thus, when the cleaning apparatus 200 is being used, there is maintained a pressure differential between the outer surface or external surface 145 and the dirt collection conduit system 220.
  • the suction chamber 205 further comprises a central nozzle 225 attached to the first end 210 of the suction chamber 205.
  • the central nozzle 225 is such that a largest diameter of the central nozzle 225 is lesser than an inner diameter of the suction chamber 205.
  • the central nozzle 225 and the suction chamber 205 are arranged concentrically. Between the largest diameter of the central nozzle 225 and the inner diameter of the suction chamber 205 is a circular clearance 230 in which is circularly arranged a plurality of peripheral suction nozzles 235.
  • the cleaning apparatus 200 is activated by initiating and maintaining a pressure differential between the outer surface 145 of the filter screen 105 and the dirt collection conduit system 220.
  • This pressure differential causes movement of fluid from the outer surface 145 of the filter screen 105 to the dirt collection conduit system 220 through the suction chamber 205.
  • a low pressure regime 240 is created around and in proximity to a mouth 245 of the central nozzle 225 inside the suction chamber 205.
  • This low pressure regime 240 acts as a suction force to suck or pull fluid from the outer surface 145 of the filter screen 105 to rush towards the low pressure regime 240, such that the retentate accumulated in the inner surface 140 of the filter screen 105 is forcefully removed.
  • the low pressure regime is formed due to increased velocity which is due to the convergence in the section of the nozzle 225.
  • the pressure differential due to the low pressure regime 240 created is more than the pressure differential between the outer surface 145 of the filter screen 105 and the purge outlet 150 through the dirt collection conduit system 220
  • the suction chamber 205 is arranged to rotate about an axis 110' of the dirt collection conduit system 220.
  • the axis 110' of the dirt collection conduit system 220 is the same as the axis 110' of the housing 110, as the dirt collection conduit system 220 extends along the axis 110' of the housing 110.
  • the rotation of the suction chamber 205 is meant to remove the retentate from a circular portion of the cylindrical filter screen 105.
  • one complete rotation of the suction chamber 205 about the axis 110' of the dirt collection conduit system 220 when the cleaning apparatus 200 is functioning results in the removal of retentate circularly from the filter screen 105.
  • the cleaning apparatus 200 further comprises a plurality of suction chambers 205 coupled rotatably to the dirt collection conduit system 220 at different positions along the axis 110' of the dirt collection conduit system 220.
  • the number of rotatable suction chambers 205 can vary anywhere from 2 to 5 or more depending on the length of the filter screen 105 inside the housing 110.
  • the advantage of having a plurality of suction chambers 205 is to cover the entire surface area of the filter screen 105.
  • the rotation of the suction chambers 205 is achieved by hydraulic or electric rotating techniques, which is understood by a person skilled in the art.
  • the principle of working of the plurality of suction chambers 205 are the same as described above.
  • the dirt collection conduit system 220 further comprises a plurality of nozzles 250 arranged inside a conduit 255 of the dirt collection conduit system 220, such that the number of nozzles 250 is the same as the number of suction chambers 205.
  • One nozzle among the plurality of nozzles 250 is associated with one suction chamber within the plurality of suction chambers 205.
  • Each nozzle among the plurality of nozzles 250 creates a low pressure regime near the mouth of the nozzle which enhances or adds up the suction force inside the suction chambers 205 triggered by the existence of the pressure differential between the outer surface 145 of the filter screen 105 and the dirt collection conduit system 220. This is described in detail hereinafter.
  • the central nozzle 225 comprises a first portion 260 with a constant cross sectional area and a second portion 265 with a converging cross sectional area.
  • the first portion 260 is proximal and adjacent to the first end 210 of the suction chamber 205 and the second portion 265 is distal to the first end 210 of the suction chamber 205.
  • Figure 3 shows a divergent cone 270 disposed in the suction chamber 205 of the first embodiment of the cleaning apparatus 200.
  • the suction chamber 205 can additionally comprise a divergent cone 270 extending from an opening or mouth of the second portion 265 to the second end 215 of the suction chamber 205 leaving a gap around 265.
  • Divergent cone 270 facilitates streamlining of fluid ejected from the second portion 265 of the nozzle 225.
  • the low pressure regime 240 is generated inside the divergent nozzle 270 near the mouth of the second portion 265.
  • the angle of the second portion 265 is a and the angle of the divergent cone 270 is ⁇ .
  • the optimum values for a and ⁇ can be 30° to 50° and 1° to 10° respectively.
  • FIG. 4 shows a second embodiment of the cleaning apparatus 200.
  • the central nozzle 225 comprises a converging portion 275.
  • the second embodiment of the cleaning apparatus 200 is easy to manufacture resulting in lesser cost of manufacture.
  • Near the mouth of the central nozzle 225 is created the low pressure regime 240.
  • the central nozzle 225 and the suction chamber 205 are arranged coaxially.
  • the circular clearance 230 comprises a plurality of peripheral suction nozzles 235 arranged circularly in the circular clearance 230.
  • the low pressure regime 240 enables fluid to be sucked in forcefully through the plurality of suction nozzles 235, so as to remove the retentate from the inner surface 140 of the filter screen 105.
  • the central nozzle 225 and the nozzles 250 of the dirt collection conduit system work on the principle of venturi in producing a low pressure regime and associated suction.
  • the central nozzle 225 in all the embodiments mentioned can be circular, elliptical, rectangular or any other polygonal shape.
  • the second embodiment as mentioned above can be achieved with the help of an orifice plate as illustrated in Figures 5a and 5b.
  • Figure 5a shows a front elevational view of an orifice plate 280.
  • Figure 5b shows a longitudinal sectional view along section A-A of the orifice plate 280 shown in Figure 5a.
  • the suction chamber 205 is fitted with the orifice plate 280 at the first end 210 such that the orifice plate 280 fits over the central nozzle 225.
  • the orifice plate 280 has a bore 285 which fits over the central nozzle 225 of the suction chamber 205.
  • the bore 285 comprises a principal circular bore 290 and a secondary circular bore 295.
  • the principal circular bore 290 and the secondary circular bore 295 are coaxial and matches with the dimensions of the central nozzle 225 to provide a good fit for the orifice plate 280 over the central nozzle 225.
  • the orifice plate comprises a plurality of holes 296 in the periphery and surrounding the bore 285 to form the plurality of peripheral suction nozzles 235.
  • the external surface of the suction chamber 205 can be circular, elliptical or any polygonal shape.
  • the internal surface and cavity of the suction chamber 205 is cylindrical.
  • an externally elliptically shaped suction chamber 205 it is arranged in the housing 100 in such a way that the major axis makes an angle 0 with a horizontal plane.
  • the suction chamber 205 is arranged such that the slope of travel path of the suction chamber 205 matches ⁇ . The advantage of this arrangement is to minimize the drag force acting on the suction chamber 205 and make the cleaning apparatus 200 more efficient.
  • Figure 6 shows one of the plurality of nozzles 250 disposed in the conduit 255 of the dirt collection conduit system 220 as a first arrangement for producing a low pressure regime in the conduit 255 of the dirt collection conduit system 220.
  • the nozzle 250 is arranged inside the conduit 255 of the dirt collection conduit system 220.
  • the nozzle 250 is disposed in the conduit 255 such that it is adjacent to where the suction chamber 205 opens into the conduit 255, such that the low pressure regime created near the mouth of the nozzle 250 serves to enhance the suction inside the suction chamber 205.
  • the nozzle 250 comprises concentrically placed boreholes 305, 310 and 315. Outer diameter b2 of the nozzle 250 fits inside the inner diameter c of the conduit 255.
  • the distance between the boreholes 305 and 310 is al and this forms a first portion 306 of the nozzle 250 with a constant diameter.
  • the length of the nozzle 250 between the boreholes 310 and 315 is converged such that the diameter of the borehole 315 is lesser than the diameter of the borehole 305 and 310.
  • This converging portion forms a second portion 307 of the nozzle 250.
  • the angle of convergence is ⁇ .
  • the angle of convergence ⁇ can be any angle between 30° and 50°.
  • the distance between the boreholes 310 and 315 is a2.
  • the inner diameter of the nozzle 250 at the borehole 310 is bl and the inner diameter of the nozzle 250 at the borehole 315 is d.
  • the mouth of the nozzle 250 is at the borehole 315.
  • Figure 7 shows the working of the nozzle 250 described in Figure 6.
  • Liquid flowing through the conduit 255 enters the borehole 305 and travels through the borehole 310 and finally through the borehole 315 where it converges.
  • a low pressure regime 320 in the conduit 255 is created in the proximity to the borehole 315 of the nozzle 250.
  • This low pressure regime 320 in the dirt collection conduit system 220 along with a higher pressure on the outer surface 145 of the filter screen 105 creates a pressure differential which makes the fluid rush through the central nozzle 225 inside the suction chamber 205, which subsequently results in removal of retentate through the plurality of peripheral suction nozzles 235.
  • Figure 8 shows an orifice plate 325 in the conduit 255 of the dirt collection conduit system 220 which is a second arrangement for producing a low pressure regime in the conduit 255 of the dirt collection conduit system 220.
  • Figure 9 shows a schematic of the working of the orifice plate shown in Figure 8.
  • the orifice plate 325 has a thickness tl is disposed or positioned inside the conduit 255 of the dirt collection conduit system 220, such that a low pressure regime 330 produced near a mouth of the orifice plate is adjacent the opening of the suction chamber 205 into the conduit 255.
  • the orifice plate comprises a first borehole 335 and a second borehole 340, the first borehole 335 being larger than the second borehole 340.
  • the bore of the orifice plate 325 converges from the first borehole 335 towards the second borehole 340.
  • the fluid passing through the converging portion causes the low pressure regime 330 due to Bernoulli's principle.
  • the first borehole 335 and the second borehole 340 are concentric and the converging angle between them is ⁇ . ⁇ can be any value between 1° and 10°.
  • e is the diameter of the second borehole 340
  • fl is the diameter of the first borehole 335
  • f2 is the outer diameter of the orifice plate 325
  • c is the inner diameter of the conduit 255.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne un appareil permettant de nettoyer des tamis de filtre circulaires comprenant au moins une chambre d'aspiration montée sur un conduit du système de conduit de collecte de saleté s'étendant le long d'un axe central du boîtier du tamis de filtre. La chambre d'aspiration comprend une buse centrale dans laquelle le fluide est poussé pour s'écouler en raison d'une différence de pression entre la surface extérieure du tamis de filtre et une extrémité du système de conduit de collecte de saleté. L'écoulement de fluide dans la buse centrale crée un régime basse-pression près de l'embouchure de la buse centrale de telle sorte que le fluide est poussé dans une pluralité de buses d'aspiration périphériques agencées autour de la buse centrale depuis la surface extérieure du tamis de filtre jusqu'à l'intérieur de la chambre d'aspiration, forçant ainsi le décapage de la saleté et des rétentats accumulés le long de la surface intérieure du tamis de filtre.
EP16732887.1A 2015-01-04 2016-01-04 Appareil de nettoyage pour le nettoyage de tamis de filtre Active EP3240462B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2174MU2014 2015-01-04
PCT/IN2016/000003 WO2016108253A2 (fr) 2015-01-04 2016-01-04 Appareil de nettoyage pour le nettoyage de tamis de filtre

Publications (3)

Publication Number Publication Date
EP3240462A2 true EP3240462A2 (fr) 2017-11-08
EP3240462A4 EP3240462A4 (fr) 2018-12-05
EP3240462B1 EP3240462B1 (fr) 2021-09-22

Family

ID=56285113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16732887.1A Active EP3240462B1 (fr) 2015-01-04 2016-01-04 Appareil de nettoyage pour le nettoyage de tamis de filtre

Country Status (5)

Country Link
US (1) US10688418B2 (fr)
EP (1) EP3240462B1 (fr)
ES (1) ES2900754T3 (fr)
IL (1) IL252706B (fr)
WO (1) WO2016108253A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL258698A (en) * 2018-04-15 2018-05-31 Amiad Water Systems Ltd A control mechanism for self-cleaning filter systems
CN115177993A (zh) * 2022-06-07 2022-10-14 南通市华业石油机械有限公司 一种防垢防腐的磁环不锈钢筛管

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US523581A (en) * 1894-07-24 Alexander klinger
IL71999A0 (en) * 1984-06-04 1984-10-31 Filtration Water Filters For A Fluid filter system and suction nozzle therefor
US5268006A (en) 1989-03-15 1993-12-07 Matsushita Electric Industrial Co., Ltd. Ceramic capacitor with a grain boundary-insulated structure
US5228993A (en) * 1990-02-09 1993-07-20 Mordeki Drori Cleanable filter system with longitudinally movable and rotatable cleaning member
US5322222A (en) * 1992-10-05 1994-06-21 Lott W Gerald Spiral jet fluid mixer
US6267879B1 (en) * 1999-08-11 2001-07-31 Odis Irrigation Equipment Ltd. Continuous liquid filtering apparatus with multi-layer sintered filtering element
US6447617B1 (en) * 2000-03-17 2002-09-10 Aqua-Aerobic Systems, Inc. High efficiency cleaning of rotating filter media
JP3729354B2 (ja) 2002-04-04 2005-12-21 株式会社 ワイ・エム・エス 集塵装置
CN102712018B (zh) 2009-11-12 2015-10-07 过滤器安全有限公司 过滤器近端喷嘴
SG190715A1 (en) * 2010-12-02 2013-07-31 Amiad Water Systems Ltd Self cleaning filter system
KR101394227B1 (ko) 2012-08-17 2014-05-27 주식회사 파나시아 동시 역세척을 자동제어하는 멀티케이지 타입 밸러스트수 여과장치 및 그 방법
CN103611343B (zh) * 2013-12-10 2015-07-22 武汉市汉江石油物资技术开发有限责任公司 一种用于颗粒状滤料过滤装置的反冲洗喷嘴及使用方法

Also Published As

Publication number Publication date
WO2016108253A2 (fr) 2016-07-07
WO2016108253A3 (fr) 2016-10-06
EP3240462B1 (fr) 2021-09-22
US20190091612A1 (en) 2019-03-28
IL252706B (en) 2021-12-01
EP3240462A4 (fr) 2018-12-05
US10688418B2 (en) 2020-06-23
IL252706A0 (en) 2017-08-31
ES2900754T3 (es) 2022-03-18

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